Roll Out The Barrel

Assuming you offered to let Marlene stay at Corvo Bianco, you can head southeast, all the way to Trastamara Hunting Cottage (watching for Foglets and Barghests in the vicinity), and into the spoon-laiden Manor house. Venture downstairs, and then further into the cellar, to the main barrel storage. Wade through the vast array of spoons, locating the barrel pictured (right of the wall torch, left of the rickety steps), which has a different noise when you knock on it. Retrieve the following items from the barrel (one of which you can display on a shelf in Corvo Bianco), as this quest concludes.